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Lena-s Page No. 75,506, aan@ Mai-@lt 10,1868.

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Be it lrnown that I, RQDERT WOLF., of Burlington, in the county of'DesMoi-nes, and State of Iowa, have invented a new and improved Dove-'failing Machine; and do hereby Ydeclare that the follon'ingis a full, clear,

and exact description thereof,'Whichvivill enable those skilled irl the art te .make and use the same, reference` being h'adtotha'accompanying dra-Wings, forming partei' this specification, in which-,-

i FigureV ljrepresents a side elevation of my improved dove-tailng machine.

.A Figure@ isla plan or top viewof the same. v i i Fuigurel is a vertical sectional vieiv of 'the same, the planeet' setiou being indicated by thelinex iig. 2.

Figure 4 isa frontelevationYofA the saine.` v I i Sniilar letters of reference indicate corresponding parts.

This invention relates to'a new machinefor dove-tailing the side-pieces, aswell as theA front and back pieces of drawers, boxes, and other articles; andV consists of 1two parts, one for sawingthe 'side-pieces, and the other for chiselling the front and-back-pieees. l

The machine for dove-tailng the Vside-pieces consists ofa revolving circularsaw, and of an oscillating'- l carriage, uponlivhich the` board isplaced. The oscillating motion of the carriage can be regulated so that a.

recess, with more or less inclined sides, maybe cut. Whenthe sawis in contact with the edge of the board to be dovc-tailed,l the motion of the'vlatterwill bring so much of the edge within rea-ch of the saw, that the vsaine will be enabled to cut a tapering recess out ofthe board. When onerecess is cnt, the board is' mov-ed sideways,

so as to, bring'it in position-for having the next recess-enti A v The machine, fordove-:tailing the front land `hack-pieces consists of two chisels, of which'one is in a horizontal, the other in an inclined`upright`position. Both ehisels receive reciprocatingnlotion. The upright chisel cutsthe backs of' the recess by its cuttingedge, and makes the inclined face oi' the recess by its own inclined position, The.horiz'ontail chisel'determines thedepth ofthe recess, and prevents the-splitting'of the board. The earriagetowhich the board isv secured-,freceives lateral aswell as longitudinalmotion, and by the former the distance betiveenr the recesses cnt, the Alatter the length 'of the recesses', is determined.

. The mainv object of` this machine is to do away'witli the measuring of boards, and of the tedious process of dove-tailing by'hand, which is new used for dove-tailing boards. When the niachine hasronce been adjusted, it

will ineke all dove-tails alike, and equally apartso` that no drawing or nieasuringis required; i

A represents the frame` of the-machine. -VBis the driving-shaft, carrying a pulley, a, freni which, by means of belts b and c, motion is imparted to twohorizontal shafts, Gand D, respectively. E is a circular satv, mounted on the shaft'O.; On the shaft B ismounted a drum, F, which is provided witha learn-groove aroundits periphery, as shown in g. I nto'this cam-groovefits a pin', d, whichprojects vfrom a jointed lever, G, that is pivoted to stationary lugs projecting from 'the frame A. The two. jointed ends of the -lever G are slotted,

land are connected by alpinand nut, e, so that bylowering or" rais`in`g the pin, the upper permet' the lever may receive more or less oscillation, as may bedesired, `fora purpose to be hereinafter set'forth.' 'The upper end of the lever 'Gr is held'lbetweena fork,f,fwhich is secured tn aver-tical pin, y, that passes through a sliding frame,

H, (see fg. The frame rests' on suitable guidesformed on the frame A, and 'can be movedtoyvalds or from vthe saw'by m'eans offra lever, h. Ilis a carriage, resting upon the sliding frame,;l":'[,'A sind pivoted to the same by means of the 4pin g, S0 that it is connected with the,A fork f. vThe faceof the carriage I hasa recess, for the saw lto play in when the machine is intoperation. Uponl the carriage I is secured a sliding bed, J, which is, by.,

means of a dove-tail tenen and groovase'credte then carriages, its indicated irrgtl. On the under vsideo the plate Jare teeth or holes, equally farl apart from each other, to receive'the end of a spring-catch, z', which is pivoted to the carriage I, and which locks the bed-J` to the carriage I. 'To the outer and of the frame A. is

pivote/d a lever, K, Vwhich carries4 two cams, fand It, respectively. The cam jdoes, when the lever K is depressed,-

v{it-over a camion` the 'spring-catch z', and- ,depresses tiresome,- so as to release the bed @which is, at the same. time, moved in a lateraldirection, 'ineens of the cam-7c, which catches between teeth on the back edge of the.

plate J, as shown in iigs. 2 and 4. Y Y l v The operation is as follows: The board to receive the dove-tail recesses issecured upon the bed .T'bymeans of a clamp-screw, Z, and then the frameH is, bymeans of the lever 7L, moved towards the saw. By the revoi lution of the shaft B the lever Gr isoscillated, whereby an oscillating motion is also imparted to the fork f,

Iwhieh, as it is connected by the pin g with the carriage I, imparts similar oscillating motion to the latter, and

Ato all its appendages. Thus, as the frame 1I lcarries the board gradually forward, and the carriage I oscillntcs it, the, saw is caused to cut in an obliqie direction, so as to produce thc required dove-tail. As soon as the frame Hstrikes against an yadjustable stop, m, (iig. 2,) the dove-tail is cut to the required length. The frame is then drawn back, and the bed J is, by means of the lever K, moved laterally for one. tooth.y and then the frame is moved forward again, when a second dove-tail,',precisely similar tol thefirst, will be cut.

In order to make the dove-tail more or less oblique, the lscrew e in the lever G is arranged, which, the higher it is set, causes the upper end of the lever G to make larger oscillations, and thus a broader dove-tal will be produced. The shaft. C,- carrying the-saw, is hung in adjustablescrew-bearings, as shown in figs. 2 and 3, so that the saw may be laterally adjusted whenever desired. By'vvarying the distance of the holes or teeth at the under side and back edge of the bed J, the distance between the dove-tails will also be varied.

On the shaft D isl mounted a ldrum, L, which is provided, around its periphery, with a circular groove,

having a short projecting cam, as shown in g. 2. Apin, n, projecting from a sliding lever, o, which is pivoted to a lever, M, fits into the groove of the drum L. The lever M is pivoted to the face oi' the frame A, and is slotted, as shown'in g. 2, a pin, p, projecting' from a slidingbed, g, fitting through the slot'. To the bed qv is adjustably secured a chisel, N, which, by the action of the cam L upon the lever M, receives a short percussive motion once during every revolution of the camL, `or as often during that period as there are projecting Aportions on the cam-groove. The bed g, tol which the chisel N is secured, is, by means of a dove-tail tenon land groove, connected with a sliding bed, 7', which is enabled to move laterally bythe slot in thelever M, and which is, by means ,of a rod, s, connected with a lever, O, as shown. The -lever O is, by another rod, t, connected with the lower end of a plate, pP, which` is pivoted-to the frame A, and which can, by means of the lever O, be swung to'thc right or left, as may bedesired.l Between ianges projecting from the face of the plate P, is held a block, at, which' is, by means 4of a rod,v, connected with a cra-nl: on the shaft D', the pin which connects y,the rod v withvthe block u, passing through a slot in the plate P, Oscillating motion is thus imparted to the block u. From the block u project arms ww, in which an axlc, x, is held, las shown, which, at its lower end, carries a chisel, R. The loweroscillating 'edge of the chisel Rv is inclined, as shown, and the whole body of the chisel is also brought into an inclined position, by the-action of theleifer O. Adjustable stops, y'y, on a stationary projecting frame, S, regulate the inclined position of the chisel. The holder fz can be turned in the arms w, and is fastened by means of a catch, z, it being necessary that the longer edge of the chisel be always on the outside, as shown in iig. 1. Y

T is an upfand-down adjustable table, whichA can be raised and lowered by means of a screw, a', as shown in iig. 1, and which carries on its face a laterally-adjustable carriage, U, which slides on it, and can be moved by means of a lever, X, having cams b and c', which operate in a similar manner on a spring-catch, d', and on the toothed or perforated carriage U, as the lever K, withits cams, acts on the bed J'. Upon the carriage U isv placed a bed, V, which can bemoved towards or from the chisels, byl means o f a lever, W, as shown'in fig. 2. The board to bc dove-tailed is secured upon the bed V by means of a clamp-screw, e', and is then fed 'towards the chisels, an adjustable stop,f, arresting its forward motion, and thereby indicating the length of therecess to be cut, while, by the height of the'table T, the depth ofthe recesses is regulated When the board is fed towards the chisels, the ohisel'N will be pushed into it, and the chisel R will then be inserted, in an inclined direction, into the surfaceiof the board, so as to gradually take olf portions of 'th"e wood, until the required lengthis obtained. The inclined position of -the cutter R will make the side of othe holc cut by it inclined, while the back edge will be vcrticalfand the bottom,`i` one isleft, will b'e parallel' with the surface-.of

the board,owing to the position of the chisel N, which is parallel with the; board. l Afterthe board has-been thus cut, it is drawn back, and then the position of the`chisel R is reversed by means of the llever O, and the chisel is also turned vin the arms w, as'indicated in iig. 1. When', then, the board is again brought forward, the other inclined side of the dove-tailed recess will be cut. Then the board is again drawn back, and is, by means ofthe lever X, set laterally, ready to' receive the next recess.

I-claim as-fnew, and desire to secure by Letters Patent-f,

1. The combination of the cam F and jointed lever G with the fork f, pin g, and carriage I, all madefand' operating so that a suitable oscillating motion is imparted to the carriage I, substantially as and for thepnrvpose hereinshown and described.

2. The longitudinally-movable frame H, `in`combination with the oscillating carriage I, and laterally-movable bed J, allmade as described, and operating with v'the saw E, substantially as and for the purpose herein` shown and described. r

3. The combination of the lever yK, pawlj, slotted adjustable p awlk, spring-catch i. and bed J, all constructed, arranged, and operating substantially asA described.

4. The combination of the oscillating plate l?, slide u, levers M 4O, and chisel N, substantially as described ,l

for the-purpose specified.

5. .The levers aM and chisel N, in combination with the cam-L, operating substantially as described for the purpose specified.

6. The` combination of the `bed T, tripping-levers'bc, sliding rack U, and the slide V, constructed and operating substantially as described for the purpose specified. v

The above specification ofmy invention signed by me, this day of. 1867- ROBERT WOLF.

Witnesses CHARLES FRANKEN, WM. FRANKEN. 

